161535201553 has 8 divisors (see below), whose sum is σ = 176399499456. Its totient is φ = 146700783600.

The previous prime is 161535201551. The next prime is 161535201589. The reversal of 161535201553 is 355102535161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161535201553 - 2¹ = 161535201551 is a prime.

It is a super-2 number, since 2×161535201553² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161535201551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7458678 + ... + 7480303.

It is an arithmetic number, because the mean of its divisors is an integer number (22049937432).

Almost surely, 2^161535201553 is an apocalyptic number.

It is an amenable number.

161535201553 is a deficient number, since it is larger than the sum of its proper divisors (14864297903).

161535201553 is a wasteful number, since it uses less digits than its factorization.

161535201553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14939975.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 161535201553 in words is "one hundred sixty-one billion, five hundred thirty-five million, two hundred one thousand, five hundred fifty-three".